09-04-2009
Unix Commands to check a file is compressed or not?
Hi,
I need to find out whether a file is compressed or not and based on that i need to compress that file and move it to archive folder.
say for e.g:
If file is compressed then
just move to archive folder
else
compress and move
end if
i have implemented a logic wherein i am checking for the last character in the file to be 'Z', if it is 'Z' i am not compressing it again and just moving the file or else i am compressing and moving the file. This is working fine in some cases but i want to know whether there is any command to find out whether a file is compressed or not.
Please provide some pointers on this.
Thanks & Regards,
Kiran
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LEARN ABOUT CENTOS
dh_compress
DH_COMPRESS(1) Debhelper DH_COMPRESS(1)
NAME
dh_compress - compress files and fix symlinks in package build directories
SYNOPSIS
dh_compress [debhelperoptions] [-Xitem] [-A] [file...]
DESCRIPTION
dh_compress is a debhelper program that is responsible for compressing the files in package build directories, and makes sure that any
symlinks that pointed to the files before they were compressed are updated to point to the new files.
By default, dh_compress compresses files that Debian policy mandates should be compressed, namely all files in usr/share/info,
usr/share/man, files in usr/share/doc that are larger than 4k in size, (except the copyright file, .html and other web files, image files,
and files that appear to be already compressed based on their extensions), and all changelog files. Plus PCF fonts underneath
usr/share/fonts/X11/
FILES
debian/package.compress
These files are deprecated.
If this file exists, the default files are not compressed. Instead, the file is ran as a shell script, and all filenames that the shell
script outputs will be compressed. The shell script will be run from inside the package build directory. Note though that using -X is a
much better idea in general; you should only use a debian/package.compress file if you really need to.
OPTIONS
-Xitem, --exclude=item
Exclude files that contain item anywhere in their filename from being compressed. For example, -X.tiff will exclude TIFF files from
compression. You may use this option multiple times to build up a list of things to exclude.
-A, --all
Compress all files specified by command line parameters in ALL packages acted on.
file ...
Add these files to the list of files to compress.
CONFORMS TO
Debian policy, version 3.0
SEE ALSO
debhelper(7)
This program is a part of debhelper.
AUTHOR
Joey Hess <joeyh@debian.org>
11.1.6ubuntu2 2018-05-10 DH_COMPRESS(1)